oj.uz

Submission #808328

# Submission time Handle Problem Language Result Execution time Memory
808328 2023-08-05T06:02:48 Z The_Samurai Connecting Supertrees (IOI20_supertrees) C++17
56 / 100
 410 ms 22884 KB 
#include "bits/stdc++.h"
#ifdef sunnatov
#include "grader.cpp"
#else
#include "supertrees.h"
#endif

using namespace std;

struct dsu {
    vector<int> p, size;

    void init(int n) {
        p.assign(n, 0);
        size.assign(n, 1);
        for (int i = 0; i < n; i++) p[i] = i;
    }

    int get(int a) {
        return p[a] == a ? a : p[a] = get(p[a]);
    }

    void add(int a, int b) {
        a = get(a);
        b = get(b);
        if (a == b) return;
        if (size[a] > size[b]) swap(a, b);
        size[b] += size[a];
        p[a] = b;
    }
};


int construct(std::vector<std::vector<int>> p) {
	int n = p.size();

    vector<vector<int>> g(n, vector<int>(n));
    dsu ds;
    ds.init(n);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (p[i][j] == 2) {
                ds.add(i, j);
            }
        }
    }
    vector<bool> vis(n);
    for (int _ = 0; _ < n; _++) {
        int s = -1;
        vector<int> v;
        for (int i = 0; i < n; i++) {
            if (vis[i]) continue;
            if (s == -1) s = ds.get(i);
            if (ds.get(i) != s) continue;
            v.emplace_back(i);
        }
        if (v.empty()) break;
        for (int i = 0; i < v.size(); i++) {
            for (int j = i + 1; j < v.size(); j++) {
                if (!p[v[i]][v[j]]) return 0;
            }
        }

        // something
        vector<bool> another_vis(n);
        vector<int> cycle;
        for (int x: v) {
            if (another_vis[x]) continue;
            vector<int> line;
            for (int i = 0; i < n; i++) {
                if (p[x][i] == 1) line.emplace_back(i);
            }
            for (int i = 0; i < line.size(); i++) {
                for (int j = i + 1; j < line.size(); j++) {
                    if (p[line[i]][line[j]] != 1) return 0;
                }
            }
            for (int i = 1; i < line.size(); i++) g[line[i - 1]][line[i]] = g[line[i]][line[i - 1]] = 1;
            for (int y: line) another_vis[y] = true;
            cycle.emplace_back(line[0]);
        }
        if (cycle.size() > 2) {
            for (int i = 1; i < cycle.size(); i++) g[cycle[i - 1]][cycle[i]] = g[cycle[i]][cycle[i - 1]] = 1;
            g[cycle[0]][cycle.back()] = g[cycle.back()][cycle[0]] = 1;
        }


        for (int x: v) vis[x] = true;
    }
    build(g);

	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:58:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |         for (int i = 0; i < v.size(); i++) {
      |                         ~~^~~~~~~~~~
supertrees.cpp:59:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |             for (int j = i + 1; j < v.size(); j++) {
      |                                 ~~^~~~~~~~~~
supertrees.cpp:73:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |             for (int i = 0; i < line.size(); i++) {
      |                             ~~^~~~~~~~~~~~~
supertrees.cpp:74:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |                 for (int j = i + 1; j < line.size(); j++) {
      |                                     ~~^~~~~~~~~~~~~
supertrees.cpp:78:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |             for (int i = 1; i < line.size(); i++) g[line[i - 1]][line[i]] = g[line[i]][line[i - 1]] = 1;
      |                             ~~^~~~~~~~~~~~~
supertrees.cpp:83:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |             for (int i = 1; i < cycle.size(); i++) g[cycle[i - 1]][cycle[i]] = g[cycle[i]][cycle[i - 1]] = 1;
      |                             ~~^~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 10 ms 1188 KB Output is correct
7 Correct 410 ms 22052 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 10 ms 1188 KB Output is correct
7 Correct 410 ms 22052 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1108 KB Output is correct
13 Correct 165 ms 21948 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 67 ms 12856 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 224 KB Output is correct
20 Correct 40 ms 6152 KB Output is correct
21 Correct 167 ms 22812 KB Output is correct
22 Correct 162 ms 22816 KB Output is correct
23 Correct 253 ms 22884 KB Output is correct
24 Correct 162 ms 22724 KB Output is correct
25 Correct 74 ms 12872 KB Output is correct
26 Correct 70 ms 12836 KB Output is correct
27 Correct 262 ms 22748 KB Output is correct
28 Correct 160 ms 22760 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 1 ms 212 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 40 ms 5732 KB Output is correct
5 Correct 167 ms 22084 KB Output is correct
6 Correct 159 ms 22044 KB Output is correct
7 Correct 243 ms 21940 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 43 ms 5708 KB Output is correct
10 Correct 155 ms 22048 KB Output is correct
11 Correct 180 ms 21972 KB Output is correct
12 Correct 160 ms 22032 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 40 ms 5716 KB Output is correct
17 Correct 158 ms 22024 KB Output is correct
18 Correct 168 ms 22016 KB Output is correct
19 Correct 163 ms 22020 KB Output is correct
20 Correct 179 ms 22016 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 10 ms 1188 KB Output is correct
7 Correct 410 ms 22052 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1108 KB Output is correct
13 Correct 165 ms 21948 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 67 ms 12856 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 224 KB Output is correct
20 Correct 40 ms 6152 KB Output is correct
21 Correct 167 ms 22812 KB Output is correct
22 Correct 162 ms 22816 KB Output is correct
23 Correct 253 ms 22884 KB Output is correct
24 Correct 162 ms 22724 KB Output is correct
25 Correct 74 ms 12872 KB Output is correct
26 Correct 70 ms 12836 KB Output is correct
27 Correct 262 ms 22748 KB Output is correct
28 Correct 160 ms 22760 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Incorrect 1 ms 212 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 10 ms 1188 KB Output is correct
7 Correct 410 ms 22052 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1108 KB Output is correct
13 Correct 165 ms 21948 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 67 ms 12856 KB Output is correct
18 Correct 1 ms 304 KB Output is correct
19 Correct 1 ms 224 KB Output is correct
20 Correct 40 ms 6152 KB Output is correct
21 Correct 167 ms 22812 KB Output is correct
22 Correct 162 ms 22816 KB Output is correct
23 Correct 253 ms 22884 KB Output is correct
24 Correct 162 ms 22724 KB Output is correct
25 Correct 74 ms 12872 KB Output is correct
26 Correct 70 ms 12836 KB Output is correct
27 Correct 262 ms 22748 KB Output is correct
28 Correct 160 ms 22760 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Incorrect 1 ms 212 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -